Make sure you know the history of an old 3" barrel. Many have been drilled out to cycle light 2 3/4" loads. 303 barrels can have mobil chokes. Earlier barrels didn't have screw-in choke tubes, and if they do now, they were installed aftermarket. Beretta barrels don't usually come cheap. You might check with Wally (wally riebesell--660-744-4115--cst) Good luck. Mark